As promised (admittedly late), here are the comparative test results for MCW60 with stock back plate, MCW80 with stock back plate, and the EVGA FTW cooling solutions. The Delta T GPU/Air is the key indicator.

Ranked by order of performance, lower to higher:

The MCW60: 23.2C



EVGA FTW (Swiftech) cooling solution: 21.6C



and the MCW80: 20.3C



As expected, the MCW80 pulls ahead by a relatively narrow margin of 1.3C compared to the EVGA FTW cooling solution. The 60 is clearly outdated (retirement was well deserved), and the EVGA FTW performed remarkably well.